Stormrider, personally I'd remove your last as being a bit too close to slander.
The truth of the story is simple, the navaids provider have failed to get their equipment cerified in time. They have had huge problems writing safety cases that CAA would accept. Once all the paperwork has been completed CAA will visit the site and give it the final once over (including some technical checks on the kit). Then they go home to Gatwick and issue the letter clearing the kit for us. I believe the date for their visit will be around the 18th/19th december. So if (and that's quite a big if) the job has been done propoerly then 19th should be good. Wouldn't be at all surprised to see the airport going live minus some bits of kit.